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 Chemical manufacturers & importers must classify each chemical produced or imported. They must: Determine the appropriate hazard classes & associated hazard categories. Base determination on evaluation of full range of available data/evidence on the chemical (no testing required). Utilize Appendix A for health hazard criteria & Appendix B for physical hazard criteria.  Employers are not required to classify chemicals unless they choose not to rely on the classification performed by the chemical manufacturer or importer. Must then have additional data/evidence on chemical to substantiate different classification, especially lower classification. Roles

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 Term used to indicate the intrinsically hazardous properties of chemicals.  Classification comprised of 3 steps: 1.Identification of relevant data regarding the hazards of a chemical; 2.Review of the data to ascertain the hazards associated with the chemical; 3.Determination of whether the chemical will be classified as hazardous and the degree of hazard. “Hazard Classification”

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 Hazards divided first into one of three “hazard groups: 1.Physical 2.Health 3.Environmental (Not regulated under OSHA, but by EPA)  Each hazard group is comprised of a “hazard class,” such as acute toxicity or carcinogenicity.  Most hazard classes also sub-divided into “hazard categories” to reflect degree of severity of effect.  This concept of “classification” is not only determining if there is a hazardous effect (carcinogenicity), but is also evaluating and ranking the severity of the effect (Category 1 or 2). Process

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 Classification of mixtures is performed on a tiered approach.  1 st Choice Classify mixture based on test data available for the complete mixture.  2 nd Choice Use “bridging” principle, which is taking test data for individual substances &/or ingredients comprising the mixture & use it to classify mixture.  3 rd Choice If no test data exist, & bridging principles won’t work, then the method(s) described in each chapter of Appendix A of the HazCom 2012 standard for estimating hazards based on known information will be applied to classify the mixture (e.g., application of cut-off values/concentration limits). Mixtures